Function arrayDeterministic

js/sign/src/cbor/deterministic.ts:127–143

(input: Uint8Array, index: number)

// Returns length of the CBOR array in bytes and checks that each item on it
// follows the deterministic principles.
function arrayDeterministic(input: Uint8Array, index: number): number {
  const { lengthInBytes, value } = unsignedIntegerDeterministic(input, index);

  // Skip the starter byte and the bytes stating the number of elements the array has.
  let startIndexOfNextElement = index + 1 + lengthInBytes;

  for (let /*element on the array*/ i = 0; i < Number(value); i++) {
    if (startIndexOfNextElement >= input.length) {
      throw new Error(
        'Number of items on CBOR array is less than the number of items it claims.'
      );
    }
    startIndexOfNextElement += deterministicRec(input, startIndexOfNextElement);
  }

  return startIndexOfNextElement - index;
}

// Returns the length of the CBOR map in bytes and checks that each item on it
// follows the deterministic principles. Additionally to ensure deterministicity